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Reduce SSS Noise on ADAU1452

Category: Software
Product Number: ADAU1452
Software Version: Sigma Studio 4.7

Hello, i am trying to reduce the SSS noise on my system, the board uses ADAU1452 and CODEC AD1938, sample rate 48khz. This molesting noise is directly proportional to the gain in my sigma studio program (Schematic), my idea is to implemante a gate so that in case there is no audio input i apply mute to an output. This is not for microphone or voice, its for the audio.

Thank you 

Hector

  • The question is, how do i implement a gate? , i understand that i must monitor the input signal and establish a threshold, also must activate fast and when signal drops from the threshold level it must mute fast, so that no one can notice this  change 

  • Hello Hector,

    I have a project where two signals can be compared, and output can be muted/unmuted based on the results. I will attach the project below.

    Usually, we have an audio signal and control signal where the audio will be muted/unmuted based on the control signal. The control signal can be another audio signal like Mic, etc. Anyway, it can be edited as you wish.

    Where is the noise coming from in your project? you have only one audio signal coming in and you want to mute it based on itself?

    You can edit the project and change the logic as you wish. it can be customized further for your need. I just attached a basic version. It works on peak level, if you want RMS, you can also do that.

    Kindly do reply if you have any questions and describe the condition a little if this project doesn't satisfy your need.

    project1.dspproj

    Regards,

    Harish

  • Thank you for the reply, i have solved with the SIGNAL DETECTOR and a CROSS FADE, its working, in case it doesnt detect signal , i multiply x 0 to mute the HF, its working nice,